Indri  (Indri indri)

Arboreal: A species that lives in trees.
Endemic: A species or taxonomic group that is only found in one particular country or geographic area.
Gestation: The state of being pregnant; the period from conception to birth.
Montane forest: Forest occurring in the montane zone, a zone of cool upland slopes below the tree line dominated by large evergreen trees.
Opposable: Referring to a digit, (thumb or toe), that can be turned so that its pad makes contact with the pad of each of the other digits on the same limb.
Territory: Area occupied and defended by an animal, a pair of animals or a colony.
Vestigial: A characteristic, often reduced in form, with little or no contemporary use, but derived from one which was useful and well developed in an ancestral form.

1. IUCN Red List (March, 2008)
   http://www.iucnredlist.org
   
2. Richardson, M. (2006) Pers. Comm.
   
3. CITES (October, 2003)
   http://www.cites.org
   
4. Macdonald, D. (2001) The New Encyclopedia of Mammals. Oxford University Press, Oxford.
   
5. Animal Info (March, 2008)
   http://www.animalinfo.org/species/primate/indrindr.htm
   
6. Dunbar, R. and Barrett, L. (2000) Cousins, our primate relatives. BBC Worldwide Ltd, London.
   
7. Mittermeier, W., Konstant, R., Nicoll, M.E. and Langrand, O. (1992) Lemurs of Madagascar: An Action Plan for their Conservation. IUCN, Gland, Switzerland.